Scientific Reports
·
2025
·Vol. 15
·期 1
·1-15
·
IF 3.9
Feng Liujun,Chen Zhiqiang,Wang Haiyan,Chen Zhibiao,Chen Zuliang,Liu Jianhua,Zeng Yuee
Phytoremediation is currently a very popular remediation method for salvaging rare earth mining sites. However, there is still a challenge concerning how to use secondary resources such as plant biomass following the extraction of rare earth elements (REEs). Herein, Dicranopteris pedata (Houtt.) Nakaike, a REEs hyperaccumulator, served to fabricate REEs-rich carbonisation materials (REEs/C) at different temperatures. The results showed that the percentages of Pb(II) removed using REEs/C prepared at 400 °C (REEs/C-4) and 800 °C (REEs/C-8) were 85.1% and 84.0%, respectively. These amounts were better than that of REEs-C prepared at 600 °C (REEs/C-6 (67.0%)). Characterisation analysis confirmed that rich functional groups like aromatic, hydroxyl and C = C/C-C in REEs/C-4 provided more chelation sites to effectively complex with Pb(II), while the superior removal capacity of REEs/C-8 resulted from the enrichment of more REEs and abundant pore structure. Chemisorption, such as ion exchange and chelation, plays a significant role in adsorption. During the carbonisation process of REEs/C, the REEs enriched in Dicranopteris pedata contributed to the formation of rare earth oxides and oxygen vacancies in the material, and these properties enhanced the Pb removal ability of REEs/C. Moreover, the REEs contained in the material did not cause a leaching phenomenon during Pb removal, which is a safe and environmentally friendly material. Finally, the REEs/C was applied to wastewater, and it was found that this material could effectively adsorb Pb from wastewater. Overall, this study generates a new insight into: firstly, how to use phytoextracted biomass containing REEs as valuable REEs/C materials; and secondly, how to save the environment by using technology that promotes recycling of used materials.
研究领域:
环境科学
·
材料科学
·
植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WASTE MANAGEMENT
·
2026
·
IF 7.3
Liujun Feng,Jinzhu Su,Zhiqiang Chen,Zhibiao Chen,Wenqin Yang,Daifeng Lin,Haiyan Wang,Zhiqi Chen,Yuee Zeng,Zuliang Chen
Carbonisation from Dicranopteris pedata clippings (REE/C) offer a sustainable strategy for the utilisation of phytoremediation biomass in rare earth element (REE) mining regions. In this study, physicochemical properties of REE/C were characterised, and their performance in immobilising Pb, Cu, and Cd in orchard soils was evaluated using soil passivation and leaching experiments. The results showed that REE/C was mainly amorphous carbon with a small graphitic fraction, and that agglomerated La-, Ce-, and Y-containing particles were precipitated on its surface, providing a high specific surface area of 439.48 m 2 g −1 and strong adsorption capacity for heavy metals (HMs). REE/C application to contaminated agricultural soils promoted the transformation of acid-soluble and reducible HMs into oxidisable and residual fractions, thereby significantly reducing their mobility. The concentrations of Pb, Cu, and Cd in the leachates decreased to 5.46 %, 38.71 %, and 33.80 % of those in control, respectively. In addition, REE/C increased β-N-acetylglucosaminidase to 41.00 IU L −1 and leucine aminopeptidase to 95.61 IU L −1 . It also increased total nitrogen and alkaline hydrolysable nitrogen by 2.59- and 1.55-fold, respectively, and improved microbial diversity and community structure. Pearson correlation and Mantel analyses indicated that soil microbial communities were closely associated with pH, organic matter, organic carbon, nutrient availability, and endogenous REEs. These findings demonstrate that REE/C can serve as an effective amendment for HMs immobilisation and agricultural soil remediation, with endogenous REEs playing an important role in the remediation process. This study provides a resource-efficient pathway for phytoremediation biomass valorisation and soil restoration in REE mining regions.
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 2
·702
·
IF 4.6
Zhiyang Feng,Jiaqing Zhu,Shen Zhuo,Jun Chen,Wenyi Huang,Hao Cheng,Lijun Li,Tai Tang,Jun Feng
A magnetically functionalized Fe3O4@ZIF−67 metal–organic framework (MOF) was prepared by electrostatic self-assembly using magnetic Fe3O4nanoparticles as the core and ZIF−67 as the shell. The composite was characterized by electron microscopy, X-ray diffraction, Fourier- transform infrared spectroscopy, and Brunauer–Emmett–Teller measurements. Magnetic solid-phase extraction (MSPE) was performed on five flavonoids fromDicranopteris pedatausing Fe3O4@ZIF−67 as an adsorbent. The developed MSPE method was combined with high-performance liquid chromatography–ultraviolet detection to preconcentrate and separate five flavonoids (rutin, quercitrin, kaempferol-3-O-α-L-rhamnoside, quercetin, and kaempferol) fromDicranopteris pedata. The factors affecting the extraction, such as the amount of Fe3O4@ZIF−67 adsorbent, salt ion concentration in the sample solution, vortex time, type and amount of desorbing solvent, concentration of formic acid to acidify the desorbing solvent, and acetonitrile ratio, were optimized. The developed method showed good linearity over the concentration range of 1.09–70.0 μg∙mL−1for the five flavonoids, with R2values between 0.9901 and 0.9945. The limits of detection and average recoveries for the five flavonoids were in the ranges of 39.5–56.2 ng∙mL−1and 92.2–100.7%, respectively. The method presented herein is simple, efficient, and sensitive; it can be used for enrichment analysis of the five flavonoids inDicranopteris pedata.Keywords:magnetic solid-phase extraction;Fe3O4@ZIF−67;Dicranopteris pedata;flavonoids;metal–organic framework materials
研究领域:
分析化学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）